Good for what I neededBy Ericon 2/23/2015

Eric would recommend this product to a friend

This is my first auto top off and it is working fine for what I have. The size is good and the pump is running great so far. I have only been using it about a week with only one small issue. That is, I can't find a way to have the pump sit level on the bottom of my reservoir. I think it will just take some time for the hoses and cables to stretch out. Overall, good buy for me though.

Dosn't fit rimmed tanks very wellBy Adamon 2/19/2015

Adam would recommend this product to a friend

If you have a top rimmed tank this will still work but it will sit low in the tank, making the waterline below the rim. Contacting Tunze now to see what they are going to do about it if anything. Love their products but the mount for the float switch needs to go back to the drawing board. So as of now I either have to deal with the low water line or fabricate a custom mount. If the float switch fit better I would have given it a 5 star.

Nice auto top offBy Toddon 2/8/2015

Todd would recommend this product to a friend

Easy to set up and works great. My only complaint is that it needs a suction cup or something so that is attaches to the bucket as it just lays on its side without this

Good for a few monthsBy Caseyon 12/20/2014

Casey wouldn't recommend this product to a friend

My second Ato has stopped working. When the unit works, it's great.
When the first one stopped working, I reached out to BRS and Tunze. I learned that I was basically S.O.L without sending the unit back to them. I just decided to spend the money and buy a replacement.

That was a workable plan for a few months until the second unit died on me. I've decided not to buy another. I'd rather pour the RO water in myself than purchase yet another unreliable model from BRS. I hope they find a more reliable nano ATO to promote.

Works well fills needBy Thomason 12/9/2014

Thomas would recommend this product to a friend

Bought this to top off my nano tank. Set up was easy and does a good job maintaining water level. Lot less hastle than topping of tank daily and keeps salinity more stable

Can't imagine how I lived without this thingBy Seanon 12/4/2014

Sean would recommend this product to a friend

No more lugging around jugs every other day, now it's only once every couple weeks! :) This is a huge upgrade and peace of mind. I have a small tank so this is huge in helping me keep my water parameters stabilized. This is a must-have for smaller reef tanks for people serious about their corals.

Works greatBy Meatonon 11/19/2014

Meaton would recommend this product to a friend

Perfect for my nano cube 28G reef tank

Compact. Works well. By Josephon 10/29/2014

Joseph would recommend this product to a friend

The unit is very compact, works well, and maintains your water level with frequent small top offs.

My only complaint is the pump doesn't have a suction or bracket so that it sticks to the bottom/side of your reservoir bucket.

Replaced Hydro-fillBy peteron 10/7/2014

peter would recommend this product to a friend

I owned the IM Hydro-fill for about 6 months when the controller went out. I've only had the Tunze running for a couple of weeks but I like it better already. Triggers from slight water level drops and I like the idea of the built-in fail safe.
Only complaint is the pump is pretty loud.